Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d79d6feb43b5ec…

MALICIOUS

PDF

63.9 KB Created: 2021-01-16 07:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3fc51731eebbaead1f7d66680c9e4cb8 SHA-1: 90a6f2714e072ecbe2a461ce19b520d2613be651 SHA-256: 99d79d6feb43b5ec761ae6f3490106792312004dc41799c3d32dc7f427a5e8e3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?utm_term=gulf+coast+avionics+promo+code PDF link annotation
    • https://site-1168194.mozfiles.com/files/1168194/85407913390.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/8ifvm1L/helicopter_hands_dance_tik_tok.pdfIn PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/feletakezip.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/icUdoji/lonerism_vinyl_review.pdfIn PDF document text
    • https://wisezoverok.weebly.com/uploads/1/3/4/7/134707123/losuludamasemer.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/aihrT1O/16483331558.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/xatigukegadaka.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/7268912.pdfIn PDF document text
    • https://wewowaxidibu.weebly.com/uploads/1/3/2/3/132303239/4574858.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/cgjjj9V/dollar_tree_near_me_houston_tx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/debate_speech_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/apple_shooter_unblocked_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/doena_de_chagas_sintomas.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/handbook_of_psychological_assessment_fifth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/46398752000.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD6 5392 bytes
SHA-256: 61408714db44fe3a07a74e0b9522ae2e98478df09778bb42f14d328733e52dfc
font_01_sfnt_off0000cd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD24 11388 bytes
SHA-256: 481d68ad70c5b8b93eec336432b7c65d2df9e4ae0c4f83415f75cd3ab43bad84